I'm not sure this is the pee pee song you were looking for but here ya go:
Pee pee... have you ever heard a song about pee pee?
It's a little bit of rain coming out of you.
It's a tinkle it's a puddle it's a wee wee too.
Wee wee in French means yes yes yes.
No no in French means no.
Red is stop and green is go and sometimes pee pee is yellow.
